Liquid resistance.



A. AICHELE.

LIQUID RESISTANCE.

APPLICATION FILED DEC.26. 1913.

1,161,576, Patented Nov. 23, 1915.

I rtdz cfi z l 74. L MM J6 g v d1 7 V Y 9 UNITED STATES PATENT OFFICE.

ALEEM .AIOHELE, or 31mm, SWITZERLAND, sssmnon r 'AKTIENGESELLSCEAFT BROWN .BOVEBI & cm, or BADEN, SWITZERLAND.

LIQUID RESISTANCE Specification of Letters Patent.

Patented Nov. 23, 1915.

Application filed December 26, 1913. Serial No. 808,877.

' fication.

1 This invention-relates to liquid resistances and has for its object to provide an im-- proved resistance of this kind.

The invention consists in a liquid resistance in which the same resistance liquid is permanently subjected to a cycle comprising evaporation and condensation. V

In the accompanying diagrammatic drawings: Figure '1 illustrates one manner of carrying the' invention into efiz'ect. Fig. 2

illustrates a modification.

In the form illustrated in Fig. l the resistance liquid at is contained in a tank b,

above and in which is suspended a box a the lid of which carries a tube 1 open at each end. This tube is intended to allow raising and lowering the under box I). If the top. box a were entirely closed, then on raising the lower box 1) air or vapor would be compressed in a and the liquid would retain approximately its former-level and would flow over the edge of b; therefore in the rising of b the displaced air above the liquid must escape and when 12 is lowered air must be drawn in from the outside, otherwise it would be impracticable to regulate the resistance. The upper box a also carries the electrodes 0. In this boxa coil e is provided with an inlet at f and an outlet at g. The space it between the upper box a and the lower tank 1) contains a layer of oil 5.

from the surface of the liquid between the parts a and I) because of the layer of oil.

The resistance is varied by moving the lower tank upward and the outlet l'permits this to be effected without difiiculty as to change of The' parts a and b are relatively movable, the

fments according to the present invention in which cooling coilsare disposed not in the liquid but in the vapor thereof the temperature of the resistance liquid can be approximately 100 C. We find this has certain advantages; among others the size and cost of a water resistance for a given electrical capacity may be reduced. Also as the same resistance liquid is used continuously incrustation is almost entirely avoided.

' It will be understood that the form of the invention given above is described by way of example only. A modification is illustrated in Fig. 2. In this, instead of placing the cooling coils e inside the top 'vessel 0: they are placed outside, namely in a vessel a and the vapor from the resistance liquid is supplied to them by the pipe 0,- this vapor therefore being helped to condense by the cooling action of the air on the vessel. The condensed liquid can conveniently collect in the water pocket r and be returned to the vessel b for instance through the channel it. The vessel a is provided with a valve n opening in both directions but which is normally closed when the pressures on each side are equal. This valve may be interchanged with the pipe Z if desired.

- Having now described my invention what I claim as new and desire to secure by Letters Patent is 1-. An electric resistance comprising a tank containing a liquid, a fixed tank disposed above and dipping into the liquid in said first tank, electrodes depending from the cover of said fixed tank and means for condensing evaporated liquid.

2. An electric resistance comprising a tank containing a liquid, an inverted tank fixed above said first tank and sealed by the liquid therein, electrodes depending from the top of said second tank into the liquid in said In testimony whereof I have aflixed my first tank, a cooling coil arranged in the signature in presence of two Witnesses.

second tank and above the liquid in the first ALBERT AICHELE. tank together with means for permitting WVitnesses: 5 entry and egress of vapor from said second CARL CUBLA,

tank. FRANK BOHR. 

